Kin 470 lab 4 notes from video- Blood pressure and acute response- Blood pressure- Goes up an down depending on ventricular contraction- Every time you contact it goes up, then slowly declineo Goes up – systolic Typical is 120o Rest – diastolico Pressure is in mmHg- Calculation in labo Pulse pressure Subtract diastolic from systolic bp 120-80 = 40o mean arterial pressure PP/3 + diastolic (at rest) PP/2 + DBP (exercise)- BP measuremento Blood pressure cuffo Increase cuff pressure up to above systolic blood pressure – 160 mmHgo No blood flowing througho Release valveo Systolic pressure Equal to cuff pressureo 1st korotkoff sound around 120 mmHgo continue to hear sounds until 2nd Korotkoff sound 120 80 blood pressure greatly passes cuff pressure, can freely flow through beats you hear, during systole blood gets through, diastole nothing gets through should sound like an echo end of diastole – won’t hear any of the sounds- orthostatic hypotensiono drop in blood pressure when going from lying down to standing upo blood pooling when u are lying downo quickly standing up not a lot of blood near hearto less pressure insideo blood pressure will dropo quickly goes away in a few secondso some people black out when standing up quickly- BP and exerciseo SBP is expected to increase linearly with work rate 10-15 mmHg for each 50W increase in cycle powero DBP changes very littleo Returns to the pre-exercise level within 5-8 minutes after the cessation of moderate exerciseo BP returns to normal within a few minutes – depends on intensity More intense will take longer- BP and the cold pressor testo In cold environments, BP increases Increase in norepinephrine Venoconstrictiono To stimulate a cold environment, the Cold Pressor Test is used Submerge hand in ice water for 2 minutes Measure blood pressure after the 2 minutes- Lab activityo Create groups of 4 & pick 2 participantso Use the BioPac system Open L16: blood pressure labo Make sure you calibrate the system correctly Will save time and effort- Protocolo Participant 1: 2 seatedo Participant 2: 2 seatedo Participant 1: 2 supineo Break: analyze current data, make sure it looks normalo Participant 2: supine- Nexto Particpant 1: cold pressor test 3 measurements (0,5 10)o participant 2: exercise and CPT 2 measurements- after 5 mins of cycling- then 2 minutes of CPTo short lab report – results and discussion- notes from lab:o sitting, lying down, exercise, hand in bucket of iceo lying down sitting blood will pool cardiac output will decreaseo hand in ice increase in bp vasoconstriction where hand is cold and highero exercise systolic increases increased cardiac output SV increased Time in systole decreased Decrease harder and fastero Exercise with hand in cold – blood pressure
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